Charles gustave holmberg



PATENTED FEB. 23, 1904.

A No. 753,075.

o. G. HOLMBERG.

LAMP.

Brummen FILED 92,9. 1902,

2 SHEETS-SHEET l.

N0 MODEL.

JUS;-

van

PATENTBD FEB'. 23, 1904,

C. G. HOLMBERG.

LAMP.

APPLI-UATION FILED uns. 1902.

` z SHEETS-SHEET 2.

N0 MODEL.

:as cu, PHO'IQLT You. o. c

UNITED STATES Patented February 23, 1904. y

PATENT OEEIcE.

CHARLES GUSTAVE HOLMBERG, OF WOONSOCKET, SOUTH DAKOTA, ASSIGNOR TO ANNA HOLMBERG AND JOHN M. WHEELER, OF WOONSOCKET, SOUTH DAKOTA.'

LAMP.

SPECIFICATION forming part of Letters Patent N o. 753,075, dated February 23, 1904:.

Application filed April 9, 1992. Serial No. 102,078.` (No model.) Y

To a/Z whom, it wbay concern:

Be it known that I, CHARLES Gns'ravn HOLMBERG, a citizen of the United States, residing at Woonsocket, in the county of Sanborn and State of South Dakota, have invented certain new and useful Improvements in Lamps, of which the following is a full, clear, and exact description.

` My invention relates to lamps, more particularly of the type used out of doors and subjected to all kinds of weather.

My invention relates, further, to certain improvements upon the -carbureters for hydrocarbon-vapor generators sometimes used in connection with such lamps.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the gures.

Figure 1 is a vertical section, partly in elevation, of my lamp complete. Fig. 2 is a horizontal section upon the line m of Fig. 1. Fig. 3 is a detail showing the aperture through which the-lamp may be lighted and the lid for closing said aperture. Fig. 4 is a detail perspective view of the smoke-stack extension and the means for renderingthe same weatherproof. Fig. 5 is a plan view of the movable tubular member for rendering the lamp weatherproof. Fig. 6 is a detail of the means for rendering the mixing-chamber weatherproof.

The body of the lamp is shown at 1 and is i normally lled with a liquid hydrocarbon.

From the upper portion of the body of the lamp extends a passage 2, to which are connected the tubes 3 and 4, thesetubes being surmounted by the bracket 5, provided with a head 6, which engages a vhook 7, this hook being integral with a rod 8. Upon this rod is an adjustable sliding head 9, connected with a cap 10, which supports a cylindrical jacket 11, spaced from the cap by means of standards 12, this cylindrical jacket and cap together constitutinga sort of smoke-stack. Inside of this smoke-stack and concentric thereto is a hollow tubular member 13, provided with passages 15 16 and also provided with annular rings 14 16, the rings 14 being provided with feet 18, which engage the tubular member 11. A hood 19, having the general form of an inverted pan, is provided with an annular bead 20. An annular member 21, preferably made of metal and polished upon its under face, so as to serve as a reflector, is provided with a flange 22 and rests upon the brackets 23. The hood 19 rests upon this member, the bead 20 engaging the flange 22. This hood is provided with aprons 24 25, the same having apertures 24L 25, asindictated in Fig. 1. The hood is provided with slots 26 27, which are normally obstructed by the aprons 24 25 for the purpose of preventing the entrance of moisture and cold currents of air.

The hydrocarbon-generator comprises a hollow head 2 9, provided with an internallythreaded thimble 30, which is engaged by the pointed adjusting-screw 31 for the purpose of regulating the supply of hydrocarbon vapor. The small tube 32, connected with the head 29, is provided with a distributing-head 33 and is heated by the gases of combustion of the lamp. A short thimble 34 is in direct communication with a tube 35 within the tube 4 for the purpose of conducting the mixture of air and vapor down toward the bottom of the lamp, where it enters a passage 36 land passes upward through the burner-tube 37 and is consumed by the blaze of the lamp in the usual manner. At the bottom of the lamp immediately adjacent to the burner-tube 37 is a plate 38, provided with two distinct sets of apertures 39 and 40, separated by the chimney 41. The. outer group of apertures 39 is disposed between the chimney 41 and the globe 42. The air passing through the apertures 39 is carried upward through the annular members 43, constituting the respective bottom of the generating or mixing chamber and the top of the globe.

Upon the-lower end of the inner smokestack 13 is mounted an extension 44, of frustoconical shape, provided with slots 45. Inside of this truste-conical member, which is rigid with the lamp, is another rusto-conical member 46, provided with slots 47 and with an aperture 48. This inner member is movable relatively to the outer one for the purpose of shielding the slots 45 of the outer member and also for the purpose of enabling the lamp to be lighted without continually admitting gusts of air. A tube 49 passes through the hood 19 and through the outer frusto-conical member 44. This tube is for the purpose of enabling the operative to light the lamp, which he does by inserting a match through the tube. The outer end of the tube is normally covered by the depending flap or apron 51. By means of a knob 52 a screw 53, which works laterally in a slot 54 in the inner smoke-stack 13, may be used to turn the inner frusto-conical member 46 so as to shield the inner end of the tube 49--that is to say, when the member 46 is turned by means of the knob the aperture 48, which normally mates the end of the tube 50, is turned to another position, thus cutting off communication between the interior of the member 46 and the external air. At the same time this partial rotation of the member 46 causes the vertical slots therein to break joints with the vertical slots in the frusto-conical member 44. The slot 47 is so proportioned and so positioned as to allow this movement, while limiting the admission of air to a minimum.

A bridge 55 is placed across the interior of the member 46 and is used for the purpose of retarding the upward flow of currents of the gases of combustion. The retardation of these currents causes them to lose a portion of their heat, thereby heating the hood 19 together with its contents. is also heated to a greater extent because of the bridge 55, which acts as a delecting-plate and 'causes the hot gases to accumulate around the tube 32 to a greater extent than would otherwise be the case. The air which enters through the apertures 40 is carried up through the chimney 41, heated by the gases of combustion, and is in turn caused to play upon the tube 32 and to heat the hood 19. The air which passes through the apertures 39 is not mixed with the gases of combustion,but is kept pure and is carried up directly into the hood 19, which together with the reflector 21 constitute a chamber for heating the pipe 32 and for maintaining the same at a constant temperature. The hydrocarbon vapor passes from the distributing-head 33 of the tube 22 The vapor-tube 32 directly into the thimble 34, thereby entraining more or less air from the heating-chamber formed by the hood 19 and the reflector 2l. This air also serves to maintain the globe 42 as cool as possible. The course of the mixed air and hydrocarbon vapor down to the burner has already been traced. The downdraft is produced by the upward draft of the burner. After the gases of combustion have done their work in heating the proper parts of the carbureter they pass upward through the inner member 46, the inner smoke-stack 13, out between this smoke-stack and the outer smoke-stack 11, and thence make their escape through the apertures 15 16, thence through the apertures 12a, between the standards 12, to the open air. It will be observed that gusts of cold wind or sheets of rain are unable to aect this lamp in the slightest degree. Every part of the lamp is reinforced to the greatest practicable extent. Actual service has demonstrated that the globe 42 and, in fact, almost the entire outer parts of the lamp may be covered with snow and ice Without materially impairing the illuminating qualties of the lamp.

. Having thus described my invention, I claim as new and desire to secure by Letters Patent- In a lamp, the combination of a hood for containing a supply of air, a chimney inclosing the same, a globe inclosing said chimney, a hood disposed above said chimney and containing a supply of air heated thereby, a burner, a metallic member closing said hood and provided with a polished concave surface facing directly toward said burner and serving as a reflector, a thimble connected with said hood and projecting thereinto, tubing connecting said thimble with said burner, a distributing-head mounted within said hood, and means for conducting a jet of hydrocarbon vapor from said distributing-head into said thimble, thereby entraining a portion of said supply of air within said hood and causing an admiXture of vapor and air to be carried to said burner.

In testimony whereofI have signed my name to this specication in the presence of two subscribing witnesses.

CHARLES GUSTAVE HOLMBERG.

Witnesses:

J. M. WHEELER, T. W. KONEMAN.

IOO 

